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边缘种
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  edge species
     4.Species number coefficient of edge species generally incresed with the length of forest edge.
     边缘种随林缘长度的增加,种数系数不断增加。
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  “边缘种”译为未确定词的双语例句
     So it was much better to consider P. undulatum as a species of Pythium, rather than Phytophthora.
     (1) 被称为“中间属”或“独立属”或“边缘种”的5种腐霉P.
短句来源
     Pest insect community on orange leaves is analyzed with fuzzy cluster method.
     经模糊聚类分析表明,柑桔叶片害虫群落由3个集群和3个边缘种组成。
短句来源
     By using niche analysis for 14 dominant species at the six station in Shuimo River,Urumqi, the reationships between community structure and water pollution were discussed. The niche ordinahon from the overlap matrix resulted in a r-k continuum of successional gradients, and based on it the commnity dendrogram was also made by cluster analysis. The commnity was separated into four guilds and one fringe species.
     本文利用生态位理论,对水磨河6个站点,讨论了14个优势种的群落结构与水体污染之间的关系,在r—k连续统中进行种的生态位排序,通过聚类分析绘出底栖动物群落树状图,将水磨河底栖动物群落分成四个集群类型和一个边缘种,并叙述了其污染生态学特性和生态对策。
短句来源
  相似匹配句对
     Edge
     边缘
短句来源
     An Advanced Edge Filling Algorithm
     一改进的边缘填充算法
短句来源
     A Simplified Method of Edge Growing
     一简化的边缘生长方法
短句来源
     PEOPLE ON THE EDGE
     人在边缘
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     F.
     新F.
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  edge species
Most hedgerow species are forest-edge species, and apparently none is limited to hedgerows.
      
However, no 'edge' species, which were mostly restricted to or spend most of their time in ecotones, were found.
      
On the other hand, the high percentage of alien species and the low percentages of forest and forest edge species in the habitat garden indicate the problems of a habitat garden constructed in the center of a city.
      
Species with limited tolerance to the gradient extremes had their peak frequency in intermediate positions (`Edge' species).
      
However, the majority of individual birds found in the logged forest were generalist or forest-edge species.
      
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  marginal species
Each model confirms previous findings that the value to private researchers of the ``marginal species'' is likely to be small.
      
However, more detailed investigations of other marginal species of Alona are necessary for understanding the position of A.
      
Our study underlines the necessity of a global revision both of small Alona-like genera, and marginal species of Alona, as recently their classification is unclear, and borders between genera are not drawn accurately.
      
The ponds in the Reserve were constructed in September 2003 and planted with a range of marginal species, outlined on page 21.
      


The pole ordering of the species with space niche (horizontal and vertical) and time niche is as follows: the community of field rats from Zhongjiang, Sichuan, consists of two demes and one peripheral species. The first deme is formed from A. agrarius plus M. musculus living in almost every corner of field becouse of broad adaption, but their popula- tion peak and feeding time in a day are different. That is the foundation of them living in a same niche. The second deme is R. norvegicus plus R. niviventer that...

The pole ordering of the species with space niche (horizontal and vertical) and time niche is as follows: the community of field rats from Zhongjiang, Sichuan, consists of two demes and one peripheral species. The first deme is formed from A. agrarius plus M. musculus living in almost every corner of field becouse of broad adaption, but their popula- tion peak and feeding time in a day are different. That is the foundation of them living in a same niche. The second deme is R. norvegicus plus R. niviventer that belongs to middle type of body, their biology is diff- erent from one another with population peak, feeding time and their un- ique territory that makes them share one niche. R. niviventer is a peri- pheral species of the community that usually lives in hill fields of lone- ly place feeding on corn, cotton, wheat and so on with unique niche se- parate from other two demes. The difference of niche of different spec- ies in one community is great advantage to share limit resources, to reduce cotention among species that are benefit to population increasing.

利用三维生态位资料进行PO排序。结果表明,四川省中江县农田害鼠群落由两个集群和一个边缘种组成。第一集群为黑线姬鼠加小家鼠,分布广,适应性强,二者因发生高峰期和取食时间的差异而集聚共存,占领同一生态位;第二集群为褐家鼠加大足鼠,属中型鼠类,由于二者栖息地的异域性,取食时间和发生高峰期的差异而聚集成群;社鼠为群落的边缘种,主要分布在坡地、草丛,以旱粮作物为主食,独占一个生态位。由于群落中种群生态位的差异,不仅可以更充分有效地利用资源,而且可以减小种间竞争,利于物种自身的繁衍。

The Fuzzy clustering and pole ordering of the apple leaves insectswere studied with three dimensions data,the results showed that,the co-mmunity of the apple leaves insects from Maowen county of Sichuan con-sists of four demes and two peripheral species.The difference of nichesof different species in one community is favourable not only to share theresources efficiently,but to reduce the contention among species that areof benefit to the population increasing.

本文利用三维生态位资料进行模糊聚央和极点排序。结果表明,苹果叶片害虫由4个集群和2个边缘种组成。群落中生态位的差异,有利于充分有效地利用资源,减小种间竞争和物种的繁衍。

The present paper deals with the studies of taxonomic treatments,phytogeography and origin of the genus Pseudotsuga Carr. 2 sections, 6species and 1 variety have been accepted. Sect. Sina involves 5 species:P. forrestii, P. brevifolia, P。sinensis, P. japonicc, P. macrocarpa; while.Sect. Pseudotsuga is provided only with 1 species and 1 variety: P.menziesii, P. menziesii var. glauca. The first section covers a typical areaof "E. Asia & N。America disjuncted", and the second one is endemicto western N. America....

The present paper deals with the studies of taxonomic treatments,phytogeography and origin of the genus Pseudotsuga Carr. 2 sections, 6species and 1 variety have been accepted. Sect. Sina involves 5 species:P. forrestii, P. brevifolia, P。sinensis, P. japonicc, P. macrocarpa; while.Sect. Pseudotsuga is provided only with 1 species and 1 variety: P.menziesii, P. menziesii var. glauca. The first section covers a typical areaof "E. Asia & N。America disjuncted", and the second one is endemicto western N. America. Geograpic distribution of the genus and vicariouspattern of affinis species are discussed, by means of the related datafrom cytology and paleobotany, the following proposals are presented: 1.Sect. Sina is a primitive group, Sect. Pseudotsuga is an advanced one,which may be originated from an ancestral Sina group for its 12 pairsof chromosomes happened to be reanged; 2。Pseudotsuga might be a genusdeveloped in North Pacific Floristic area, and originated in E. Asia,while western N. America can be regarded as a developing center of the genus.

本文对黄杉属的分类进行了整理,共2组、6种、1变种:黄杉组,计5种,花旗松组,1种,1变种。前者为典型的“东亚——北美间断分布”类型。后者为北美西部特有分布,作者在分析和探讨本属地理分布、边缘种替代规律的同时。结合有关细胞学和古植物学资料提出:1.黄杉组是原始类群,花旗松组系由黄杉组经[12]对染色体发生结构重组而产生的进化类群;2.黄杉属是环太平洋植物系发展起来的属。可能起源于东亚。而北美西部则是本属的发展中心。

 
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